<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Bootstrap 实例 - 简单的可折叠组件</title>
<link rel="stylesheet" href="bootstrap/3.3.7/css/bootstrap.min.css">
<script src="jquery/2.1.1/jquery.min.js"></script>
<script src="bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

	<button type="button" class="btn btn-primary" data-toggle="collapse"
		data-target="#demo">简单的可折叠组件</button>

	<div id="demo" class="collapse in">Nihil anim keffiyeh helvetica,
		craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad
		vegan excepteur butcher vice lomo.</div>

</body>
</html>